Dan uses an Apple TV 4k box running zwift as an app. The apple tv only has two BT "ports", so he adds his phone to the mix using the zwift companion app - it provides more connections HRM, cadence for older kickr, kickr interface, external power meter.
The apple tv 4k is attached to the tv for the video part - the phone is kept close to, or on the bike, as it can help with intervals and choosing workouts, turns, waving, pics, etc.
also provides a dashboard so the screen can run cleaner (if that matters)
How are you mirroring the iPad? does the tv have built-in airplay?